Combined cases of os calsis fracture and compression fracture of vertebra are not uncommon. In fact, eight out of twenty-two cases (36%) of os calsis fractures we have recently treated fall under this category.Recent employment of canvas traction in the treatment of compression fracture of vertebra has also made operative techniques for os calsis fractures easier to apply.However, in view of prognosis, we are faced with a dilemma that the discontinuance of his therapy at an early stage tends to cause re-crushing of recuperating vertebral body, whereas prolonged application may result in atrophy of foot bones, thus lowering working ability.Results of the above eight cases involved, including two incorrect diagnoses, have been:one:goodfour:fairthree:poor.We shall now try to make investigations into the causes of poor results in the hope of contributing somewhat to the treatment of these cases.